Oscar Egg’s first derailleur design (called ‘Champion’ rather than ‘Super Champion’) used a derailing fork that acted on the top run of the chain - meaning that you had to back pedal to change gear. The drawings shows a three speed system.

• Publisher: L’Institut national de la propriété industrielle
• Inventor: Oscar Egg
• Country: France
• Date: French application May 1932
• Derailleur brands: Super Champion
• Derailleurs: Champion